:root {
  --ink: #1f2a2e;
  --muted: #6d7a7d;
  --soft: #f6f8f5;
  --paper: #ffffff;
  --paper-warm: #fffdf8;
  --line: #dde7df;
  --line-strong: #c7d8cf;
  --sage: #2f7d69;
  --sage-dark: #246553;
  --sage-soft: #e8f4ee;
  --mint: #d9f0e7;
  --coral: #d97862;
  --coral-soft: #fff0eb;
  --gold: #b58731;
  --gold-soft: #fff7de;
  --blue: #496d8f;
  --blue-soft: #eaf2fa;
  --red: #a34c45;
  --red-soft: #fff0ef;
  --shadow: 0 18px 42px rgba(45, 71, 62, 0.12);
  --shadow-soft: 0 10px 28px rgba(45, 71, 62, 0.08);
  --shadow-lift: 0 22px 46px rgba(39, 68, 60, 0.15);
  --radius: 12px;
  --ease-out: cubic-bezier(0.2, 0.8, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
}

body {
  position: relative;
  margin: 0;
  min-height: 100vh;
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 10%, rgba(217, 240, 231, 0.85), transparent 28%),
    radial-gradient(circle at 86% 18%, rgba(255, 240, 235, 0.78), transparent 26%),
    linear-gradient(180deg, #fbfcf9 0%, var(--soft) 100%);
  background-size: 100% 100%, 100% 100%, 100% 100%;
  animation: pageGlow 16s var(--ease-out) infinite alternate;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.6;
  background:
    linear-gradient(115deg, rgba(255, 255, 255, 0.42), transparent 30%, rgba(217, 240, 231, 0.22) 58%, transparent 78%),
    repeating-linear-gradient(90deg, rgba(31, 42, 46, 0.018) 0, rgba(31, 42, 46, 0.018) 1px, transparent 1px, transparent 12px);
  mix-blend-mode: multiply;
  animation: surfaceSheen 18s linear infinite alternate;
}

a {
  color: inherit;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

button,
a,
input,
textarea,
select {
  transition: border-color 160ms ease, background 160ms ease, color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

button:hover,
.primary-button:hover {
  transform: translateY(-1px);
}

button.tap-flash::before,
.primary-button.tap-flash::before {
  content: "";
  position: absolute;
  inset: -42%;
  border-radius: inherit;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.38), transparent 56%);
  transform: scale(0.2);
  animation: tapFlash 460ms var(--ease-out) both;
}

button:active,
.primary-button:active {
  transform: translateY(0) scale(0.985);
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 3px solid rgba(47, 125, 105, 0.22);
  outline-offset: 2px;
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 28px;
}

.login-shell::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(47, 125, 105, 0.045) 1px, transparent 1px),
    linear-gradient(0deg, rgba(47, 125, 105, 0.045) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(180deg, black, transparent 76%);
}

.login-panel {
  position: relative;
  width: min(440px, 100%);
  padding: 34px;
  border: 1px solid rgba(199, 216, 207, 0.88);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
  animation: riseIn 520ms var(--ease-out) both;
}

.login-panel::before {
  content: "潘";
  position: absolute;
  top: -22px;
  right: 28px;
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 50%;
  color: #fff;
  font-size: 22px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--sage), #62a58d);
  box-shadow: 0 12px 24px rgba(47, 125, 105, 0.24);
  animation: avatarFloat 4.8s ease-in-out infinite;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--sage);
  font-size: 13px;
  font-weight: 800;
}

.login-panel h1 {
  margin: 0;
  font-size: clamp(27px, 5vw, 34px);
  line-height: 1.18;
  letter-spacing: 0;
}

.login-copy {
  margin: 12px 0 24px;
  color: var(--muted);
  line-height: 1.75;
}

.login-rhythm {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: -6px 0 22px;
}

.login-rhythm span {
  min-height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid #dcece2;
  border-radius: 999px;
  color: var(--sage-dark);
  font-size: 13px;
  font-weight: 800;
  background: #f4fbf7;
  animation: softPop 520ms var(--ease-out) both;
}

.login-rhythm span:nth-child(2) {
  animation-delay: 70ms;
}

.login-rhythm span:nth-child(3) {
  animation-delay: 140ms;
}

.alert {
  margin-bottom: 14px;
  padding: 11px 13px;
  border: 1px solid #ffd3cf;
  border-radius: 10px;
  color: var(--red);
  background: var(--red-soft);
}

.form {
  display: grid;
  gap: 15px;
}

.form label {
  display: grid;
  gap: 8px;
  color: #405256;
  font-size: 14px;
  font-weight: 700;
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  padding: 11px 12px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
}

input:hover,
textarea:hover,
select:hover {
  border-color: #a9c7b9;
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--sage);
  box-shadow: 0 0 0 4px rgba(47, 125, 105, 0.1);
}

textarea {
  min-height: 48px;
  resize: vertical;
}

.form button,
.composer button,
.slot-row button,
.grid-form button,
.actions button,
.inline-form button,
.primary-button {
  border: 0;
  border-radius: 10px;
  padding: 11px 16px;
  color: #fff;
  font-weight: 800;
  background: linear-gradient(135deg, var(--sage), var(--sage-dark));
  box-shadow: 0 10px 20px rgba(47, 125, 105, 0.18);
  position: relative;
  overflow: hidden;
}

.form button::after,
.composer button::after,
.slot-row button::after,
.grid-form button::after,
.actions button::after,
.inline-form button::after,
.primary-button::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 0%, rgba(255, 255, 255, 0.22) 45%, transparent 72%);
  transform: translateX(-120%);
  transition: transform 520ms var(--ease-out);
}

.form button:hover::after,
.composer button:hover::after,
.slot-row button:hover::after,
.grid-form button:hover::after,
.actions button:hover::after,
.inline-form button:hover::after,
.primary-button:hover::after {
  transform: translateX(120%);
}

.demo-accounts {
  display: grid;
  gap: 6px;
  margin-top: 20px;
  padding: 12px 14px;
  border-radius: 12px;
  color: #607073;
  font-size: 13px;
  background: #f4faf6;
}

.demo-accounts strong {
  color: #405256;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 232px minmax(0, 1fr);
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 22px 15px;
  color: #f5fff9;
  background:
    linear-gradient(120deg, rgba(255, 255, 255, 0.13), transparent 32%),
    repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.038) 0, rgba(255, 255, 255, 0.038) 1px, transparent 1px, transparent 12px),
    linear-gradient(180deg, #1f6d5a 0%, #245b50 56%, #223d45 100%);
  animation: slideInLeft 420ms var(--ease-out) both;
  overflow: hidden;
}

.sidebar::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.12), transparent 24%, rgba(0, 0, 0, 0.08));
  opacity: 0.75;
}

.sidebar h1 {
  position: relative;
  z-index: 1;
  margin: 0 0 20px;
  padding: 0 6px;
  font-size: 21px;
  line-height: 1.25;
  letter-spacing: 0;
}

.sidebar a,
.sidebar button {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  margin-bottom: 8px;
  padding: 11px 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 11px;
  text-align: left;
  text-decoration: none;
  color: #f6fff9;
  background: rgba(255, 255, 255, 0.105);
  backdrop-filter: blur(10px);
}

.sidebar a:hover,
.sidebar button:hover {
  background: rgba(255, 255, 255, 0.18);
  transform: translateX(2px);
}

.sidebar a.active {
  color: #1f4f49;
  background: #ffffff;
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.12);
}

.sidebar-note {
  position: relative;
  z-index: 1;
  margin-top: 24px;
  padding: 14px;
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.14);
}

.sidebar-note span {
  display: block;
  margin-top: 5px;
  color: #cce3d8;
}

.mobile-dock {
  display: none;
}

.content {
  padding: 28px;
  animation: fadeLift 420ms var(--ease-out) both;
}

.page-title {
  margin-bottom: 18px;
}

.page-title h2 {
  margin: 0 0 7px;
  font-size: clamp(23px, 3vw, 29px);
  line-height: 1.25;
}

.page-title p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.panel {
  position: relative;
  margin-bottom: 17px;
  padding: 19px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow-soft);
  animation: fadeLift 420ms var(--ease-out) both;
  overflow: hidden;
}

.panel::before,
.metric::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.62), transparent 38%, rgba(47, 125, 105, 0.055));
  opacity: 0;
  transition: opacity 220ms ease;
}

.panel:hover,
.metric:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}

.panel:hover::before,
.metric:hover::before {
  opacity: 1;
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 20px;
  align-items: start;
}

.grid-form {
  display: grid;
  grid-template-columns: repeat(5, minmax(120px, 1fr));
  gap: 10px;
  align-items: end;
}

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 14px;
}

th,
td {
  padding: 12px 10px;
  border-bottom: 1px solid #e8efe9;
  text-align: left;
  vertical-align: top;
}

th {
  color: #53686b;
  font-weight: 800;
  background: #f6faf7;
}

tr:hover td {
  background: rgba(232, 244, 238, 0.38);
}

.text-link {
  color: var(--sage-dark);
  font-weight: 800;
}

.empty,
.muted {
  color: var(--muted);
  line-height: 1.7;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px;
}

.metric {
  position: relative;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-soft);
  animation: softPop 420ms var(--ease-out) both;
  overflow: hidden;
}

.metric strong {
  display: block;
  margin-bottom: 6px;
  font-size: 34px;
  color: var(--sage);
}

.chat-page {
  --pointer-x: 50%;
  --pointer-y: 18%;
  position: relative;
  min-width: 0;
  height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  background: #fff;
  overflow: hidden;
}

.chat-page::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.85;
  background:
    radial-gradient(circle at var(--pointer-x) var(--pointer-y), rgba(217, 240, 231, 0.62), transparent 24%),
    linear-gradient(120deg, rgba(255, 255, 255, 0.52), transparent 42%);
  transition: background-position 220ms ease;
}

.chat-header,
.messages,
.typing-note,
.composer {
  position: relative;
  z-index: 1;
}

.chat-header {
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 18px 24px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(16px);
  animation: fadeDown 360ms var(--ease-out) both;
}

.teacher-avatar,
.avatar {
  position: relative;
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  font-weight: 800;
  background: linear-gradient(135deg, var(--sage), #66a88d);
  box-shadow: 0 8px 16px rgba(47, 125, 105, 0.2);
}

.teacher-avatar::after,
.avatar::after {
  content: "";
  position: absolute;
  inset: 3px;
  border-radius: inherit;
  border: 1px solid rgba(255, 255, 255, 0.42);
}

.teacher-avatar {
  animation: avatarFloat 5.2s ease-in-out infinite;
}

.avatar {
  width: 34px;
  height: 34px;
  font-size: 12px;
}

.chat-header h2 {
  margin: 0;
  font-size: 20px;
}

.chat-header p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.messages {
  padding: 24px;
  overflow: auto;
  background:
    linear-gradient(115deg, rgba(255, 255, 255, 0.72), transparent 36%, rgba(217, 240, 231, 0.28) 72%, transparent),
    radial-gradient(circle at 18% 8%, rgba(255, 247, 222, 0.6), transparent 23%),
    linear-gradient(180deg, rgba(255, 253, 248, 0.94), rgba(247, 251, 248, 0.96)),
    repeating-linear-gradient(0deg, transparent 0, transparent 31px, rgba(47, 125, 105, 0.052) 32px),
    repeating-linear-gradient(90deg, transparent 0, transparent 63px, rgba(73, 109, 143, 0.026) 64px);
  background-size: auto, auto, auto, 100% 32px, 64px 100%;
  animation: paperDrift 14s linear infinite;
  scroll-behavior: smooth;
}

.messages::-webkit-scrollbar {
  width: 10px;
}

.messages::-webkit-scrollbar-track {
  background: rgba(232, 244, 238, 0.52);
}

.messages::-webkit-scrollbar-thumb {
  border: 2px solid rgba(247, 251, 248, 0.95);
  border-radius: 999px;
  background: rgba(47, 125, 105, 0.36);
}

.message {
  display: flex;
  gap: 11px;
  max-width: 780px;
  margin-bottom: 18px;
  transform-origin: 22px 20px;
  animation: messageIn 430ms var(--ease-spring) both;
}

.message:nth-child(2n) {
  animation-delay: 40ms;
}

.message.pending-reply[hidden] {
  display: none;
}

.message.reply-revealed {
  animation: replyReveal 520ms var(--ease-out) both;
}

.message.student {
  margin-left: auto;
  flex-direction: row-reverse;
}

.message.student .avatar {
  background: linear-gradient(135deg, #7792a7, var(--blue));
}

.message > div:last-child {
  min-width: 0;
}

.sender {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.message.student .sender {
  text-align: right;
}

.message p {
  position: relative;
  margin: 0;
  padding: 13px 15px;
  border: 1px solid #d7e8dc;
  border-radius: 4px 14px 14px 14px;
  line-height: 1.78;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(248, 252, 249, 0.96)),
    #ffffff;
  box-shadow: 0 8px 22px rgba(45, 71, 62, 0.08);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
  overflow: hidden;
}

.message p::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.56), transparent 36%, rgba(47, 125, 105, 0.05));
  opacity: 0;
  transition: opacity 180ms ease;
}

.message p:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 26px rgba(45, 71, 62, 0.1);
  border-color: #bdd8ca;
}

.message p:hover::before {
  opacity: 1;
}

.message.teacher p {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(242, 250, 246, 0.96)),
    #f8fcf9;
}

.message.student p {
  border-color: #d7e5f3;
  border-radius: 14px 4px 14px 14px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.62), rgba(234, 242, 250, 0.98)),
    #eef6fb;
}

.attachment {
  display: inline-block;
  margin-top: 8px;
  color: var(--sage-dark);
  font-size: 13px;
  font-weight: 800;
  text-decoration: none;
}

.attachment:not([hidden]) {
  padding: 7px 10px;
  border: 1px solid rgba(47, 125, 105, 0.18);
  border-radius: 999px;
  background: rgba(232, 244, 238, 0.72);
  box-shadow: 0 6px 14px rgba(47, 125, 105, 0.08);
}

.attachment:not([href]) {
  color: var(--muted);
  pointer-events: none;
}

.composer {
  padding: 14px 18px 18px;
  border-top: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0.96)),
    rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(18px);
  animation: fadeUp 360ms var(--ease-out) both;
}

.typing-note {
  padding: 10px 20px 0;
  color: var(--muted);
  font-size: 13px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(18px);
}

.typing-note span {
  width: 5px;
  height: 5px;
  display: inline-block;
  margin-right: 4px;
  border-radius: 50%;
  background: var(--sage);
  animation: typingDot 1.1s ease-in-out infinite;
}

.typing-note span:nth-child(2) {
  animation-delay: 140ms;
}

.typing-note span:nth-child(3) {
  animation-delay: 280ms;
}

.composer-tools {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.file-button {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: #f8fbf9;
  color: #304b47;
}

.file-button input {
  display: none;
}

.file-name {
  color: var(--muted);
  font-size: 13px;
}

.composer-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

.composer-actions {
  display: grid;
  grid-template-columns: 70px 90px;
  gap: 8px;
}

.secondary-button {
  color: var(--sage-dark) !important;
  border: 1px solid rgba(47, 125, 105, 0.2) !important;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(232, 244, 238, 0.92)) !important;
  box-shadow: 0 8px 18px rgba(47, 125, 105, 0.08) !important;
}

.secondary-button.listening {
  color: #fff !important;
  background: linear-gradient(135deg, var(--coral), #b95d4d) !important;
  animation: voicePulse 1s ease-in-out infinite;
}

.voice-status {
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
}

.composer-row textarea {
  min-height: 60px;
  max-height: 180px;
  border-radius: 14px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.78);
}

.composer-row textarea:focus {
  transform: translateY(-1px);
  box-shadow:
    0 0 0 4px rgba(47, 125, 105, 0.1),
    0 12px 24px rgba(45, 71, 62, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.86);
}

.slot-row {
  display: grid;
  grid-template-columns: 1fr minmax(140px, 220px) auto;
  gap: 10px;
  align-items: center;
}

.slot-row p {
  margin: 4px 0 0;
  color: var(--muted);
}

.status {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 4px 9px;
  border-radius: 999px;
  color: var(--gold);
  background: var(--gold-soft);
  white-space: nowrap;
  font-weight: 800;
  animation: softPop 300ms var(--ease-out) both;
}

@keyframes pageGlow {
  0% {
    background-position: 0% 0%, 100% 0%, 0 0;
  }
  100% {
    background-position: 2% 1%, 96% 2%, 0 0;
  }
}

@keyframes surfaceSheen {
  from {
    transform: translate3d(-1.5%, 0, 0);
  }
  to {
    transform: translate3d(1.5%, 0, 0);
  }
}

@keyframes tapFlash {
  from {
    opacity: 0.85;
    transform: scale(0.18);
  }
  to {
    opacity: 0;
    transform: scale(1);
  }
}

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.985);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes fadeLift {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes softPop {
  from {
    opacity: 0;
    transform: scale(0.96);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-12px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes messageIn {
  from {
    opacity: 0;
    filter: blur(2px);
    transform: translateY(10px) scale(0.985);
  }
  to {
    opacity: 1;
    filter: blur(0);
    transform: translateY(0) scale(1);
  }
}

@keyframes replyReveal {
  from {
    opacity: 0;
    filter: blur(3px);
    transform: translateY(10px) scale(0.99);
  }
  to {
    opacity: 1;
    filter: blur(0);
    transform: translateY(0) scale(1);
  }
}

@keyframes avatarFloat {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-3px);
  }
}

@keyframes paperDrift {
  from {
    background-position: 0 0, 0 0, 0 0, 0 0, 0 0;
  }
  to {
    background-position: 12px 0, 0 0, 0 0, 0 32px, 64px 0;
  }
}

@keyframes typingDot {
  0%,
  100% {
    transform: translateY(0);
    opacity: 0.45;
  }
  50% {
    transform: translateY(-3px);
    opacity: 1;
  }
}

@keyframes voicePulse {
  0%,
  100% {
    transform: translateY(0) scale(1);
  }
  50% {
    transform: translateY(-1px) scale(1.02);
  }
}

.status.approved,
.status.active {
  color: var(--sage-dark);
  background: var(--sage-soft);
}

.status.rejected,
.status.disabled {
  color: var(--red);
  background: var(--red-soft);
}

.status.adjusted {
  color: var(--blue);
  background: var(--blue-soft);
}

.style-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.style-grid .wide {
  grid-column: 1 / -1;
}

.style-grid h3,
.panel h3 {
  margin: 0 0 10px;
}

.style-grid p {
  margin: 0;
  color: #43585a;
  line-height: 1.82;
}

.inline-form,
.actions form {
  display: inline-flex;
  gap: 6px;
  margin: 2px;
  vertical-align: middle;
}

.actions input {
  width: 150px;
  min-width: 120px;
  padding: 8px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }

  .chat-page {
    --pointer-x: 50%;
    --pointer-y: 18%;
  }
}

@media (max-width: 980px) {
  .app-shell,
  .two-column {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
  }

  .student-shell .sidebar {
    display: none;
  }

  .mobile-dock {
    position: fixed;
    left: 12px;
    right: 12px;
    bottom: 10px;
    z-index: 20;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    padding: 8px;
    border: 1px solid rgba(199, 216, 207, 0.82);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.92);
    box-shadow: 0 14px 34px rgba(45, 71, 62, 0.18);
    backdrop-filter: blur(18px);
  }

  .mobile-dock a {
    min-height: 40px;
    display: grid;
    place-items: center;
    border-radius: 12px;
    color: #405256;
    text-decoration: none;
    font-weight: 800;
  }

  .mobile-dock a.active {
    color: #fff;
    background: linear-gradient(135deg, var(--sage), var(--sage-dark));
    box-shadow: 0 8px 18px rgba(47, 125, 105, 0.2);
  }

  .chat-page {
    height: 100vh;
    grid-template-rows: auto minmax(0, 1fr) auto auto;
    padding-bottom: 74px;
  }

  .chat-page::before,
  body::after {
    display: none;
  }

  .grid-form,
  .metrics,
  .slot-row,
  .style-grid {
    grid-template-columns: 1fr;
  }

  .content,
  .messages {
    padding: 16px;
  }

  .content {
    padding-bottom: 94px;
  }

  .composer-row {
    grid-template-columns: 1fr;
  }

  .composer-actions {
    grid-template-columns: 1fr 1.2fr;
  }
}

@media (max-width: 560px) {
  .login-shell {
    padding: 18px;
  }

  .login-panel {
    padding: 28px 20px 22px;
    border-radius: 14px;
  }

  .chat-header {
    padding: 14px 16px;
  }

  .message {
    max-width: 94%;
  }

  .composer {
    padding: 12px;
  }

  .login-rhythm {
    grid-template-columns: 1fr;
  }
}

/* Academy platform refresh */
:root {
  --academy-navy: #14324a;
  --academy-ink: #182b35;
  --academy-green: #1e7a68;
  --academy-teal: #2aa39a;
  --academy-gold: #d7a84b;
  --academy-coral: #d96e58;
  --academy-sky: #4c7ca8;
  --academy-bg: #f4f7f2;
  --academy-cream: #fffaf0;
  --academy-card: rgba(255, 255, 255, 0.94);
  --academy-line: #d9e4db;
  --radius: 8px;
}

body {
  color: var(--academy-ink);
  background:
    linear-gradient(90deg, rgba(20, 50, 74, 0.035) 1px, transparent 1px),
    linear-gradient(0deg, rgba(20, 50, 74, 0.03) 1px, transparent 1px),
    linear-gradient(180deg, #fbfcf8 0%, var(--academy-bg) 48%, #eef5f3 100%);
  background-size: 36px 36px, 36px 36px, auto;
  animation: none;
}

body::after {
  opacity: 0.38;
  background:
    linear-gradient(120deg, rgba(255, 255, 255, 0.56), transparent 36%, rgba(215, 168, 75, 0.08) 62%, transparent 86%),
    repeating-linear-gradient(90deg, rgba(20, 50, 74, 0.018) 0, rgba(20, 50, 74, 0.018) 1px, transparent 1px, transparent 18px);
}

.login-shell {
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 440px);
  gap: 28px;
  place-items: stretch;
  align-items: center;
  padding: clamp(22px, 5vw, 58px);
}

.login-hero {
  position: relative;
  min-height: 560px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(30px, 5vw, 56px);
  border: 1px solid rgba(20, 50, 74, 0.1);
  border-radius: 8px;
  color: #f7fbf8;
  background:
    linear-gradient(135deg, rgba(20, 50, 74, 0.96), rgba(26, 91, 82, 0.93)),
    linear-gradient(45deg, rgba(215, 168, 75, 0.18), transparent);
  box-shadow: 0 24px 60px rgba(20, 50, 74, 0.2);
  overflow: hidden;
  animation: fadeLift 520ms var(--ease-out) both;
}

.login-hero::before {
  content: "";
  position: absolute;
  inset: 18px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  pointer-events: none;
}

.login-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(90deg, transparent, black 18%, black 82%, transparent);
}

.brand-mark {
  width: 62px;
  height: 62px;
  display: grid;
  place-items: center;
  margin-bottom: 26px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 8px;
  color: var(--academy-navy);
  background: #fff7df;
  font-size: 28px;
  font-weight: 900;
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.18);
}

.login-hero .eyebrow,
.section-kicker {
  display: inline-flex;
  width: fit-content;
  margin: 0 0 10px;
  color: var(--academy-gold);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0;
}

.login-hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(34px, 5.4vw, 66px);
  line-height: 1.05;
  letter-spacing: 0;
}

.login-hero p {
  max-width: 620px;
  margin: 20px 0 0;
  color: rgba(247, 251, 248, 0.82);
  font-size: 17px;
  line-height: 1.9;
}

.learning-path {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  width: min(620px, 100%);
  margin-top: 34px;
}

.learning-path span {
  min-height: 48px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  color: #fffaf0;
  font-weight: 900;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(14px);
}

.login-panel {
  align-self: center;
  border-radius: 8px;
  border-color: rgba(20, 50, 74, 0.12);
  box-shadow: 0 22px 52px rgba(20, 50, 74, 0.14);
}

.login-panel::before {
  border-radius: 8px;
  background: linear-gradient(135deg, var(--academy-green), var(--academy-teal));
}

.login-panel h1,
.page-title h2,
.chat-header h2 {
  color: var(--academy-navy);
}

.login-rhythm span,
.demo-accounts {
  border-radius: 8px;
}

.app-shell {
  grid-template-columns: 256px minmax(0, 1fr);
}

.sidebar {
  padding: 20px 14px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), transparent 28%),
    linear-gradient(180deg, #14324a 0%, #1c5e58 64%, #16353f 100%);
}

.sidebar-brand {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
  padding: 8px 6px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.sidebar-brand > span {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  color: var(--academy-navy);
  background: #fff5d6;
  font-weight: 900;
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.16);
}

.sidebar-brand h1 {
  margin: 0;
  padding: 0;
  font-size: 19px;
}

.sidebar-brand small {
  display: block;
  margin-top: 4px;
  color: rgba(244, 250, 247, 0.64);
  font-weight: 800;
}

.sidebar > h1 {
  display: none;
}

.sidebar a,
.sidebar button {
  border-radius: 8px;
  background: transparent;
  border-color: transparent;
  font-weight: 800;
}

.sidebar a.active {
  color: var(--academy-navy);
  background: #fff8e5;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.16);
}

.sidebar-note,
.panel,
.metric,
.mobile-dock,
input,
textarea,
select,
.file-button {
  border-radius: 8px;
}

.content {
  padding: 34px;
}

.platform-title {
  padding: 24px;
  border: 1px solid rgba(20, 50, 74, 0.08);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(255, 250, 240, 0.88)),
    var(--academy-card);
  box-shadow: 0 14px 34px rgba(20, 50, 74, 0.08);
}

.panel,
.metric {
  border-color: var(--academy-line);
  background: var(--academy-card);
  box-shadow: 0 14px 34px rgba(20, 50, 74, 0.08);
}

.metrics {
  gap: 16px;
  margin-bottom: 18px;
}

.metric {
  min-height: 132px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-top: 4px solid var(--academy-green);
}

.metric:nth-child(2) {
  border-top-color: var(--academy-gold);
}

.metric:nth-child(3) {
  border-top-color: var(--academy-coral);
}

.metric:nth-child(4) {
  border-top-color: var(--academy-sky);
}

.metric strong {
  color: var(--academy-navy);
}

th {
  color: var(--academy-navy);
  background: #eef5ef;
}

.chat-page {
  grid-template-rows: auto auto minmax(0, 1fr) auto auto;
  background:
    linear-gradient(90deg, rgba(20, 50, 74, 0.03) 1px, transparent 1px),
    linear-gradient(0deg, rgba(20, 50, 74, 0.026) 1px, transparent 1px),
    #f7faf6;
  background-size: 34px 34px, 34px 34px, auto;
}

.chat-page::before {
  display: none;
}

.learning-strip {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 24px;
  color: #fff;
  background:
    linear-gradient(135deg, rgba(20, 50, 74, 0.96), rgba(30, 122, 104, 0.92)),
    var(--academy-navy);
  box-shadow: 0 14px 36px rgba(20, 50, 74, 0.18);
}

.learning-strip strong {
  display: block;
  color: #fffaf0;
  font-size: 21px;
}

.study-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.study-chips span {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  color: #fffaf0;
  font-size: 13px;
  font-weight: 900;
  background: rgba(255, 255, 255, 0.1);
}

.chat-header {
  border-bottom: 1px solid rgba(20, 50, 74, 0.08);
}

.teacher-avatar,
.avatar {
  border-radius: 8px;
  background: linear-gradient(135deg, var(--academy-green), var(--academy-teal));
}

.messages {
  background:
    linear-gradient(90deg, rgba(20, 50, 74, 0.025) 1px, transparent 1px),
    linear-gradient(0deg, rgba(20, 50, 74, 0.022) 1px, transparent 1px),
    linear-gradient(180deg, rgba(255, 252, 244, 0.95), rgba(243, 248, 244, 0.96));
  background-size: 34px 34px, 34px 34px, auto;
  animation: none;
}

.message p {
  border-radius: 8px;
  border-color: #dce7dd;
}

.message.teacher p {
  background: #ffffff;
}

.message.student p {
  border-color: #d7e4ef;
  background: #edf6fb;
}

.composer {
  border-top-color: rgba(20, 50, 74, 0.1);
}

.form button,
.composer button,
.slot-row button,
.grid-form button,
.actions button,
.inline-form button,
.primary-button {
  border-radius: 8px;
  background: linear-gradient(135deg, var(--academy-green), var(--academy-navy));
}

.secondary-button {
  color: var(--academy-navy) !important;
  background: #fff8e5 !important;
}

.status {
  border-radius: 8px;
}

@media (max-width: 980px) {
  .login-shell {
    grid-template-columns: 1fr;
  }

  .login-hero {
    min-height: auto;
  }

  .learning-strip {
    align-items: flex-start;
    flex-direction: column;
  }

  .chat-page {
    grid-template-rows: auto auto minmax(0, 1fr) auto auto;
  }
}

@media (max-width: 560px) {
  .learning-path {
    grid-template-columns: repeat(2, 1fr);
  }

  .login-hero {
    padding: 28px 22px;
  }

  .login-hero h1 {
    font-size: 34px;
  }

  .study-chips {
    justify-content: flex-start;
  }
}

@media (max-width: 980px) {
  html,
  body {
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
  }

  .app-shell {
    width: 100%;
    min-width: 0;
    display: block;
  }

  .student-shell .sidebar {
    display: none;
  }

  .student-shell .chat-page,
  .student-shell .content {
    width: 100%;
    max-width: 100vw;
    min-width: 0;
  }

  .learning-strip {
    gap: 12px;
    padding: 14px 16px 12px;
  }

  .learning-strip strong {
    font-size: 22px;
    line-height: 1.25;
  }

  .study-chips {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
  }

  .study-chips span {
    justify-content: center;
    min-width: 0;
    padding: 0 10px;
  }

  .chat-header {
    padding: 14px 16px;
  }

  .messages {
    padding: 14px 14px 120px;
  }

  .message {
    max-width: 100%;
  }

  .composer {
    padding: 12px 14px calc(86px + env(safe-area-inset-bottom, 0px));
  }

  .composer-tools {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .composer-row textarea {
    min-height: 76px;
  }

  .mobile-dock {
    left: 14px;
    right: 14px;
    bottom: calc(12px + env(safe-area-inset-bottom, 0px));
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 420px) {
  .learning-strip strong {
    font-size: 20px;
  }

  .study-chips {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .chat-header h2 {
    font-size: 18px;
  }

  .chat-header p {
    font-size: 13px;
    line-height: 1.55;
  }

  .composer-actions {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  }

  .file-name {
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}